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S.D = Distance from the mean.
Now 98 is +3 S.D and 58 is -2 S.D
Distance between 98-58 = 40 i.e 3+2 S.D so
40/5 = 8 .
Now Check :
Add 8*2 = 16 +58 = 74
8*3 = 98- 24 = 74.
A
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Sun Sep 11, 2011 12:55 am- Forum: Problem Solving
- Topic: gmat prep
- Replies: 2
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Thu Sep 08, 2011 3:42 am- Forum: Data Sufficiency
- Topic: DS - Geometry.
- Replies: 5
- Views: 6310
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Thu Sep 08, 2011 3:16 am- Forum: Data Sufficiency
- Topic: DS - Geometry.
- Replies: 5
- Views: 6310
DS - Geometry.
http://www.beatthegmat.com/btg-pq-if-cd ... 85847.html
Q : Why this triangle is not following 30-30-120 i.e 6- 6- 12 Root 3 ?
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Wed Sep 07, 2011 1:00 pm- Forum: Data Sufficiency
- Topic: DS - Geometry.
- Replies: 5
- Views: 6310
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Tue Sep 06, 2011 4:21 am- Forum: GMAT Math
- Topic: Plugging In
- Replies: 5
- Views: 6137
The Fault with Anshul Explanantion is : Stacey Comment : FYI: the term divisible, or evenly divisible, means that there is no remainder when solving. Zero divided by anything but zero equals zero. No remainder - so zero is, in fact, divisible by 4 (or anything except zero). Zero divided by zero is u...
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Sun Aug 21, 2011 1:04 pm- Forum: Data Sufficiency
- Topic: Interesting DS question
- Replies: 49
- Views: 22456
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Sat Aug 13, 2011 4:54 am- Forum: I just Beat The GMAT!
- Topic: From 480/ 660 to 710: Testing with 100% Extra Time
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Permutation
An oratorical society consists of six members, and at an upcoming meeting, the members will present a total of four speeches. If no member presents more than two of the four speeches, in how many different orders could the members give speeches? (A)720 (B)1080 (C)1170 (D)1470 (E)1560
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Sat Aug 06, 2011 5:16 am- Forum: Problem Solving
- Topic: Permutation
- Replies: 1
- Views: 963
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Mon Aug 01, 2011 6:42 am- Forum: Reading Comprehension
- Topic: Man RC 700+ Question
- Replies: 12
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Sat Jul 30, 2011 11:01 pm- Forum: Problem Solving
- Topic: mental maths
- Replies: 5
- Views: 1375
Anurag
i did not get this part :
Hence, minimum possible value of n = 12.
Largest possible integer that divides n is 12.
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Fri Jul 29, 2011 5:30 am- Forum: Problem Solving
- Topic: n
- Replies: 4
- Views: 1134
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Fri Jul 29, 2011 5:24 am- Forum: Problem Solving
- Topic: n
- Replies: 4
- Views: 1134
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Fri Jul 29, 2011 5:17 am- Forum: Problem Solving
- Topic: GMAT Practice Qs
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Wed Jul 27, 2011 4:12 am- Forum: Critical Reasoning
- Topic: 700+ Man Question Boldface Question Man
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- Views: 1657
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Mon Jul 25, 2011 11:00 pm- Forum: Problem Solving
- Topic: PS
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- Views: 1120